{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{2}{c}}
\toprule
            &\multicolumn{1}{c}{Log Output (Pieces)}&\multicolumn{1}{c}{Total Output (Boxes)}\\\cmidrule(lr){2-2}\cmidrule(lr){3-3}
            &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}\\
\midrule
 \\ \hline Observations & 1018 & 1018  \\ Mean Dep. Var & 10.81 & 6.97  \\ Shift Effects & Yes & Yes  \\ Line X Day Effects & Yes & Yes  \\ \multicolumn{3}{p{8cm}}{\tiny \textit{Notes:} Standard errors clustered at production line-cohort-level. *** p<0.01, ** p<0.05, * p<0.1.} \\ \end{tabular} }
